I brought a moped around a week ago, its a 1978 Puch Maxi Sport MKII. I knew it wouldnt start when i brought it, but it looked like the spark plug and cap were bad. (the cap was badly broken and the sparkplug was very old) I got a new spark plug, cap and wire from steve's moped. I cleaned out the carb, checked for fuel flow and it looked very good. All I needed was the spark plug. I installed the spark plug and nothing. It doesn't seem to kick over. Kinda like when yer starting a lawn mower and it does that vroom, vroom thing, but doesnt catch. I checked the spark plug for a spark and it has a pretty bright blue spark. I hope this is enough details. I'm wondering if it might be a compression problem. How do you check that?
Thanks for all your help